后张预应力加固带构造柱砖墙性能研究

发布时间：2018-01-14 06:01

本文关键词：后张预应力加固带构造柱砖墙性能研究　出处：《工业建筑》2017年11期 　论文类型：期刊论文

【摘要】：为解决带构造柱砖砌体墙体在地震作用下易开裂、易发生脆性破坏等抗震性能差的问题,提出了一种新型后张预应力加固带构造柱砖砌体方法。为验证该方法的加固效果,进行了8片带构造柱砖砌体墙片在水平低周反复荷载下的试验,包括1片无预应力筋加固的对比墙片;7片均匀布置不同对数预应力钢筋与不同竖向预应力的加固墙片。并进一步基于MSC.MARC有限元软件分析了其在单调位移加载下的受力形态。试验与有限元仿真结果共同表明该方法可以显著提高无筋墙体的抗剪强度与整体性能,从而显著提高其抗震能力。在验证有限元计算方法正确的基础上进行了有限元参数化分析,分析结果表明在预应力钢筋应力比为0.4时加固效果较好。
[Abstract]:In order to solve the problem of poor seismic performance such as easy cracking and brittle failure of brick masonry wall with structural columns under earthquake action. In this paper, a new method of post-tensioned prestressed reinforced brick masonry with structural columns is proposed. In order to verify the effect of this method, eight pieces of brick masonry walls with structural columns are tested under horizontal low cyclic loading. Including 1 piece of contrast wall without prestressed reinforcement; Seven pieces of reinforced wall with different logarithmic prestressing bars and different vertical prestressing forces are uniformly arranged. The stress patterns under monotone displacement loading are further analyzed based on MSC.MARC finite element software. The results of finite element simulation show that this method can significantly improve the shear strength and overall performance of unreinforced wall. The finite element parametric analysis is carried out on the basis of verifying that the finite element calculation method is correct. The results show that the reinforcement effect is better when the stress ratio of prestressed steel bar is 0.4.
【作者单位】：中国矿业大学(北京)力学与建筑工程学院;北京市建筑工程研究院有限责任公司;北京建筑大学北京未来尝试设计高精尖中心2011节能减排协同创新中心;
【基金】：973重大项目(802015CB575) 国家自然科学基金项目(51478027,51174012) 北京市科技计划重大项目(D131100003713003) 北京市自然科学基金项目(8162019)
【分类号】：TU362
【正文快照】： 砌体结构自重大,整体性能差,并且许多砌体结构在设计初期并没有考虑抗震构造措施,农村中的砌体结构建造工艺也良莠不齐,这些特点均导致砌块之间黏结强度不足以及面外抗弯和面内抗剪强度都很低。在历次地震中砌体结构会发生较大的剪切变形,砌块与砂浆黏结处会发生较大的剪切斜

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